/**
*      author: Y_Yao
*      created: 2024-11-30 19:44:41
**/

#include<bits/stdc++.h>

using namespace std;
using LL = long long;
const LL LLINF = 1e18;
const int INF = 0x3f3f3f3f;

void solve()
{
    int n,d;
    cin >> n >> d;
    string s;
    cin >> s;
    for(int i = s.size() - 1;i >= 0;i--)
    {
        if(s[i] == '@' && d)
        {
            d--;
            s[i] = '.';
        }

        if(d == 0) break;
    }

    cout << s << endl;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}